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Problem 1.1.14
Determine whether the data set is a population or a sample. Explain your reasoning.
The annual revenue of each team in a pro sports league
Problem 1.1.17
Determine whether the data set is a population or a sample. Explain your reasoning.
The number of guests in each room of a hotel
Problem 1.1.18
Determine whether the data set is a population or a sample. Explain your reasoning.
The amount spent by every tenth person cashing out at a store
Problem 1.1.21
Use the Venn diagram to identify the population and the sample.
Problem 1.1.24
Use the Venn diagram to identify the population and the sample.
Problem 1.1.30
Identify the population and the sample. Describe the sample data set.
A survey of 214 of the seniors graduating with a bachelor of science degree from a university found that 15% planned to obtain entry-level jobs in the health field.
Problem 1.1.36
Determine whether the number describes a population parameter or a sample statistic. Explain your reasoning.
A survey of 919 college board members found that 89% think that their institution is a good place for members of racial and ethnic minorities. (Source: Association of Governing Boards of Universities and Colleges)
Problem 1.1.38
Determine whether the number describes a population parameter or a sample statistic. Explain your reasoning.
In January 2021, 54% of the governors of the 50 states in the United States were Republicans. (Source: National Governors Association)
Problem 1.1.40
Determine whether the number describes a population parameter or a sample statistic. Explain your reasoning.
Voter registration records show that 47% of all voters in a county are registered as Democrats.
Problem 1.1.43
Which part of the survey described in Exercise 31 represents the descriptive branch of statistics? What conclusions might be drawn from the survey using inferential statistics?
Problem 1.1.47
A study showed the same level of T cell production in senior citizens who are amateur cyclists as in young adults, but a significantly lower level of T cell production in senior citizens who do not exercise regularly. Is it appropriate to infer that exercise stimulates T cell production? Explain. (Source: University of Birmingham)
Problem 1.1.5
"Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
A statistic is a numerical description of a population characteristic."
Problem 1.1.7
"Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
It is impossible to obtain all the census data about the U.S. population."
Problem 1.1.11
"Determine whether the data set is a population or a sample. Explain your reasoning.
The salary of each employee of an advertising firm"
Problem 1.1.13
"Determine whether the data set is a population or a sample. Explain your reasoning.
A survey of 250 members from an organized union of over 20,000 members"
Problem 1.1.27
"Identify the population and the sample. Describe the sample data set.
A survey of 1500 U.S. adults found that 59% have never had a vaccine reaction. (Source: SingleCare)"
Problem 1.1.33
"Identify the population and the sample. Describe the sample data set.
To gather information about starting salaries at companies listed in the Standard & Poor’s 500, a researcher contacts 74 of the 500 companies."
Problem 1.1.48
A study showed an association between intentional weight loss and a decreased risk of high blood pressure. Is it appropriate to infer from this study that weight loss causes a decreased risk of high blood pressure? Explain. (Source: European Association for the Study of Obesity)
Problem 1.2.1
Name each level of measurement for which data can be qualitative.
Problem 1.2.2
Name each level of measurement for which data can be quantitative.
Problem 1.2.5
Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
More types of calculations can be performed with data at the nominal level than with data at the interval level.
Problem 1.2.7
Determine whether the data are qualitative or quantitative. Explain your reasoning.
Nationalities of passengers on a plane
Problem 1.2.9
Determine whether the data are qualitative or quantitative. Explain your reasoning.
Ages of dogs at a rescue facility
Problem 1.2.14
Determine whether the data are qualitative or quantitative. Explain your reasoning.
Response times for a customer service representative
Problem 1.2.17
Determine the level of measurement of the data set. Explain your reasoning.
The lengths (in centimeters) of 22 Ford automobiles are listed. (Source: Automobiledimension.com)
404 407 410 416 421 438 440 443 461 467 471 478 480 483 483 485 487 487 497 505 534 536
Problem 1.2.20
Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure.
Problem 1.2.22
Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure.
Problem 1.2.24
Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure.
Problem 1.2.25
The items below appear on a physician’s intake form. Determine the level of measurement of the data for each category.
a. Temperature
b. Allergies
c. Weight
d. Pain level (scale of 0 to 10)
Problem 1.2.29
Determine whether the data are qualitative or quantitative, and determine the level of measurement of the data set.
Census Regions The four geographical regions of the United States recognized by the U.S. Census Bureau are listed.
Northeast, South, Midwest, West
